NET HORSEPOWER 125 kw 167 HP @ 2000 rpm WA320-6 OPERATING WEIGHT 14330-14545 kg 31,590-32,070 lb BUCKET CAPACITY 2.3-3.2 m 3 3.0-4.2 yd 3 WA 320 WHEEL LOADER Photo may include optional equipment.
WA320-6 W HEEL L OADER WALK-AROUND High Productivity & Low Fuel Consumption with Hydrostatic Transmission High performance SAA6D107E-1 engine Low fuel consumption Electronically-controlled HST with variable shift control system Variable traction control system S-mode Excellent Operator Environment HST traction control switch Electronically controlled directional lever Tiltable steering column Low-noise designed cab Pillar-less large ROPS/FOPS Level 2 cab-integrated Easy entry/exit, rear-hinged doors 2 TM KOMTRAX equipped machines can send location, SMR and operation maps to a secure website utilizing wireless technology. Machines also relay error codes, cautions, maintenance items, fuel levels, and much more. Environmentally Friendly EPA Tier 3 and EU Stage 3A emissions certified Low exterior noise Low fuel consumption
Increased Reliability Reliable Komatsu designed and manufactured components Sturdy main frame Adjustment-free, fully hydraulic, wet disc service and parking brakes Hydraulic hoses use flat face O-ring seals W HEEL L OADER Cathion electrodeposition process is used to apply primer paint Powder coating process is used to apply main structure paint Sealed DT connectors for electrical connections WA320-6 NET HORSEPOWER 125 kw 167 HP @ 2000 rpm OPERATING WEIGHT 14330-14545 kg 31,590-32,070 lb BUCKET CAPACITY 2.3-3.2 m 3 3.0-4.2 yd 3 Easy Maintenance Equipment Management Monitoring System (EMMS) Easy access, gull-wing type engine side doors Automatic reversible fan KOMTRAX Photo may include optional equipment. 3
WA320-6 W HEEL L OADER HIGH PRODUCTIVITY AND LOW FUEL CONSUMPTION Hydrostatic Transmission (HST) High Performance SAA6D107E-1 Engine Electronic Heavy Duty Common Rail fuel injection system provides optimum combustion of fuel. This system also provides quick throttle response to match the machine s powerful tractive effort and quick hydraulic response. Net: 125 kw 167 HP Low Emission Engine This engine is EPA Tier 3 and EU Stage 3A emissions certified, without sacrificing power or machine productivity. Low Fuel Consumption The high-torque engine and Hydrostatic Transmission (HST) with maximum efficiency in the low-speed range provide low fuel consumption. Eco Indicator The eco indicator will help an operator to achieve energy savings. Eco indicator Electronically-Controlled HST Using a 1-Pump, 2-Motor System The 1-pump, 2-motor system allows high-efficiency and high tractive effort. Engine power is transmitted hydraulically to a transfer case, then mechanically out to the differentials and out to the four driving wheels. HST provides quick travel response and aggressive drive into the pile. The variable displacement system automatically adjusts to the tractive effort demand to provide maximum power and efficiency. Full auto-shifting eliminates any gear shifting and kickdown operation to allow the operator to concentrate on digging and loading. When high drive torque is needed for digging, climbing, or initiating movement, the pump feeds both motors. This combination makes the loader very aggressive and quick. Under deceleration, the HST system acts as a dynamic brake on the mechanical drive system. The dynamic brake can hold the loader in position on most workable slopes. This can be an advantage in stockpiling and ramp loading. As the machine moves and gains ground speed, the torque demand decreases and the low speed motor is effectively removed from the drive system by a clutch. At this point, the flow is going to the high-speed motor and the low-speed motor is not causing drag on the system. An inching pedal gives the operator excellent simultaneous control of travel and equipment hydraulic speeds. By depressing the inching pedal, drive pump flow to the motors will decrease, reducing ground speed and allowing the operator to use the accelerator to increase flow to the equipment hydraulics. Depressing the inching pedal further will activate the service brakes. Low speed piston motor Transfer case Engine Piston Pump High speed piston motor To differentials 4
W HEEL L OADER WA320-6 Electronically-Controlled HST with Variable Shift Control System The operator can choose between first, second, third or fourth maximum speeds by dialing the speed range selector switch. For V-cycles, the operator can set the speed control switch to 1 or 2, which provides aggressive digging, quick response, and fast hydraulics. For load and carry, select 3 or 4 which still provides aggressive digging but with much faster travel speed. The variable shift switch allows the operator to adjust machine speed in applications such as confined V-loading. When in 1, the operator can adjust travel speed using the variable shift switch to match machine speed and hydraulics to the distance travelled. This feature is also useful when powering a broom or snowblower. Tractive effort Variable Traction Control System The tractive effort of the machine, when traveling at a low speed, can be reduced by using the traction control switch. Combined with torque proportioning differentials, or optional limited slip differentials this system provides the following benefits. Facilitates operation on soft ground where the tires of the machine are apt to slip. Eliminates excessive bucket penetration and reduces tire slippage during stockpile loading to improve the work efficiency. 0 1st 2nd 3rd 4th 0 2.5mph 8.1mph Variable range of travel speed 2.5 8.1 (mph) Travel speed Reduces tire slippage to extend the life of tires. Furthermore, the maximum tractive effort can be adjusted in three stages (one stage for conventional machines) when the traction control switch is ON. This allows the operator to select the optimum tractive effort for diversified road conditions. Tractive effort Adjust the machine speed using the Variable shift control system 8.1mph 11.6mph 23.6mph Max: Traction control switch is OFF. (Max. tractive effort) 0 Travel speed Max. tractive effort can be adjusted in 3 stages when the traction control switch is ON. S-mode Setting the switch to S-mode provides optimum driving force for operations on slippery road surfaces, like snow-removal on snow-covered surfaces, resulting in reduced tire slippage and facilitation of the operation. Unexpected tire slippage on slippery road surfaces is suppressed by controlling the engine speed and HST motor when traveling at a low speed. (S-mode is effective only in forward travel.) Max. Traction Switch Max. traction switch is located on the work equipment control lever. When the traction control switch is at the ON position or S-mode is selected, pushing this switch cancels the setting of the traction control temporarily and increases the tractive effort to its 100% value. Then pushing the max. traction switch again or operating the F/R lever returns the tractive effort to the set value automatically. This switch is useful for operations such as stockpile work where large tractive effort is required temporarily. Accelerator Pedal Sensitive HST Control Finely-tuned HST control according to the accelerator pedal angle reduces shocks and allows smoother traveling and better energy-saving operation. Maximum Dumping Clearance and Reach The long lift arms provide high dumping clearances and maximum dumping reach. The operator can even level loads on the body of a dump truck easily and efficiently. Tractive effort Dumping Clearance: 2850 mm 9'4" Dumping Reach: 1035 mm 3'5" (2.8 m 3 3.7 yd 3 bucket with B.O.C.E.) S-mode: Reduces the tractive effort when traveling at a low speed 0 Travel speed 5
WA320-6 W HEEL L OADER INCREASED RELIABILITY Komatsu Components Komatsu manufactures the engine, transfer case, axles, and hydraulic components on Engine this wheel loader. Komatsu loaders are manufactured with an integrated production system under a strict quality control system. High-rigidity Frames and Loader Linkage The front and rear frames and the loader linkage have more torsional rigidity to provide increased resistance to stresses. The frames and loader linkage are designed to accommodate actual working loads, and simulated computer testing proves their strength. Front axle Transfer case Rear axle Wet Multi-disc Brakes and Fully Hydraulic Braking System This means lower maintenance costs and higher reliability. Wet disc brakes are fully sealed. Contaminants are kept out, reducing wear and resulting maintenance. Brakes require no adjustments for wear, meaning even lower maintenance. The new parking brake is also an adjustment-free, wet multi-disc for high reliability and long life. Added reliability is designed into the braking system by the use of two independent hydraulic circuits, providing hydraulic backup should one of the circuits fail. Fully hydraulic brakes mean no air system to bleed and no condensation of water in the system that can lead to contamination, corrosion, and freezing. Flat Face-to-Face O-Ring Seals Flat face-to-face O-ring seals are used to securely seal hydraulic hose connections. hose Cathion Electrodeposition Primer Paint/ Powder Coating Final Paint nipple O-ring Cathion electrodeposition paint is applied as a primer paint and powder coating is applied as topcoat to the exterior metal sheet parts. Some external parts are made of plastic providing long life and high impact resistance. Sealed DT Connectors Overrun Reduction System Main harnesses and controller connectors are equipped with sealed DT connectors providing high reliability, water resistance, and dust resistance. When the machine descends a slope of six degrees or less, maximum travel speed is automatically restricted to approximately 38 km/h 23 mph, for protection against damage of power train components and brakes, by sensing the travel speed and controlling the discharge amount of the HST pump and motor. When the machine descends a steep slope and the travel speed reaches 36 km/h 22 mph, the caution lamp lights up to inform the operator to reduce the travel speed. Note: When the machine descends a steep slope, the use of the service brake is necessary to limit travel speed. 6
W HEEL L OADER WA320-6 EASY MAINTENANCE Photo may include optional equipment. Equipment Management Monitoring System (EMMS) Monitor is mounted in front of the operator for easy viewing, allowing the operator to easily check gauges and warning lights. A specially designed two-spoke steering wheel allows the operator to easily see the instrument panel. Maintenance Control and Troubleshooting Functions Action code display function: If an abnormality occurs, the monitor displays action details on the character display at the center bottom of the monitor. Monitor function: Controller monitors engine oil pressure, coolant temperature, air cleaner clogging, etc. If the controller finds abnormalities, the error is displayed on the LCD. Replacement time notice function: Monitor informs replacement time of oil and filters on the LCD when replacement intervals are reached. Trouble data memory function: Monitor stores abnormalities for effective troubleshooting. Gull-wing Type Engine Side Doors Open Wide The operator can open and close each gull-wing type engine side door easily, with the assistance of a gas spring, to perform daily service checks from the ground. Ease of Radiator Cleaning If the machine is operating in adverse conditions, the operator can reverse the hydraulic cooling fan from inside the cab by pressing a switch on the control panel. Automatic Reversible Fan The engine fan is driven hydraulically and can be operated in reverse automatically. When the switch is in the automatic position, the fan revolves in reverse intermittently for 2 minutes every 2 hours. (Default setting) B: Manual Reverse Mode A: Normal Rotation Mode C: Auto Reverse Mode 7
WA320-6 W HEEL L OADER OPERATOR ENVIRONMENT Easy Operation Electronically Controlled Directional Lever The operator can change direction with a touch of his fingers without removing his hand from the steering wheel. Solid state electronics makes this possible. Tiltable Steering Column The operator can tilt the steering column to provide a comfortable working position. Multi-function Loader Control Lever with Forward & Reverse Switch A new multi-function control lever integrated with forward and reverse switch allows the operator to easily operate the work equipment, to reduce operator fatigue and to increase controllability. The adjustable wrist rest provides the operator with a variety of comfortable operating positions. Right-side Control Panel The operator can select the speed range, maximum travel speed in 1st, tractive effort, and reversible fan setting. 4 2 1 5 3 1:Speed range selector switch 2:Variable shift switch 3:Traction control switch 4:Max. traction switch 5:Fan reverse switch 8
W HEEL L OADER WA320-6 Comfortable Operation Low-noise Design Noise level at operator s ear: 70 db(a) Dynamic noise level (outside): 106 db(a) The large cab is mounted with Komatsu s unique ROPS/FOPS viscous mounts. The low-noise engine, hydraulically driven fan, and hydraulic pumps are mounted with rubber cushions, and the cab sealing is improved to provide a quiet, low-vibration, pressurized, and comfortable operating environment. Pillar-less Large Cab A wide pillar-less flat glass provides excellent front visibility. The wiper arm covers a large area to provide great visibility even on rainy days. The large cab area provides maximum space for the operator. The front mounted air conditioner was introduced to increase seat reclining and backward slide adjustment. Rear-hinged Full Open Cab Doors The large cab doors are rear-hinged to open fully, offering easy entry/exit. Exit from the cab is easily accomplished by having steps in view of the operator. Sloped hand rails help guide the foot on to the first step. Photos may include optional equipment. 9
WA320-6 W HEEL L OADER SPECIFICATIONS ENGINE Model..............................Komatsu SAA6D107E-1 Type..................................Water-cooled, 4-cycle Aspiration..........................Turbocharged, aftercooled Number of cylinders...................................... 6 Bore x stroke................. 107 mm x 124 mm 4.21" x 4.88" Piston displacement.......................... 6.69 ltr 408 in 3 Governor............................... All-speed, electronic Horsepower SAE J1995.........................Gross 127.3 kw 171 HP ISO 9249/SAE J1349....................Net 125 kw 167 HP Hydraulic fan at maximum speed...........net 117 kw 156 HP Rated rpm..................................... 2000 rpm Fan drive method for radiator cooling..................hydraulic Fuel system..................................direct injection Lubrication system: Method.........................Gear pump, force-lubrication Filter....................................... Full-flow type Air cleaner...................dry type with double elements and dust evacuator, plus dust indicator EPA Tier 3 and EU Stage 3A emissions certified. TRANSMISSION Type........Hydrostatic, 1 pump, 2 motors with speed range select Travel speed: km/h mph Measured with 20.5-25 tires 1st 2nd 3rd 4th Both Forward 4.0-13.0 13.0 18.7 38.0 and Reverse 2.5-8.1 8.1 11.6 23.6 STEERING SYSTEM Type............................Full-hydraulic power steering Steering angle............... 38.5 each direction (40 end stop) Minimum turning radius at the center of outside tire..................... 5380 mm 17'8" HYDRAULIC SYSTEM Steering system: Hydraulic pump............................gear type pump Capacity............ 172 ltr/min 45.4 U.S. gal/min at rated rpm Relief valve setting............ 20.6 MPa 210 kgf/cm 2 2,990 psi Hydraulic cylinders: Type............................Double-acting, piston type Number of cylinders...................................2 Bore x stroke............... 70 mm x 453 mm 2.8" x 17.8" Loader control: Hydraulic pump............................gear type pump Capacity........................ 61 ltr/min 16.1 U.S. gal/min Relief valve setting............ 20.6 MPa 210 kgf/cm 2 3,000 psi Hydraulic cylinders: Type............................Double-acting, piston type Number of cylinders bore x stroke: Boom cylinder........... 2-140 mm x 740 mm 5.5" x 29.1" Bucket cylinder.......... 1-160 mm x 532 mm 6.3" x 20.9" Control valve................................. 2-spool type Control positions: Boom.........................Raise, hold, lower, and float Bucket...........................Tilt-back, hold, and dump Hydraulic cycle time (rated load in bucket) Raise......................................... 6.1 sec Dump......................................... 1.2 sec Lower (Empty).................................. 3.3 sec AXLES AND FINAL DRIVES Drive system...............................four-wheel drive Front...................................Fixed, semi-floating Rear.........................Center-pin support, semi-floating, 30 total oscillation Reduction gear.............................spiral bevel gear Differential gear..........................torque proportioning Final reduction gear..............planetary gear, single reduction SERVICE REFILL CAPACITIES Cooling system.......................... 25 ltr 6.6 U.S. gal Fuel tank.............................. 245 ltr 64.7 U.S. gal Engine................................. 23 ltr 6.1 U.S. gal Hydraulic system......................... 89 ltr 23.5 U.S. gal Axle (each front and rear).................. 24 ltr 6.3 U.S. gal Transfer case........................... 6.5 ltr 1.7 U.S. gal BRAKES Service brakes.........................hydraulically actuated, wet disc brakes actuate on four wheels Parking brake........wet, multi-disc brake on transfer output shaft Emergency brake...............parking brake is commonly used Bucket capacity m 3 3.2 4.2 2.8 3.7 2.3 3.0 BUCKET SELECTION GUIDE yd 3 lb/yd 3 2023 2360 2698 3035 3372 3709 4046 kg/m 3 1200 1400 1600 1800 2000 2200 2400 Material density Bucket fill factor 115 100 95% Light Material Bucket with BOCE (Scooping and loading of light material) Stockpile Bucket with BOCE (Loading and excavating of soil, sand, and a variety of other commonly handled material) Excavating Bucket with BOCE (Loading and excavating of crushed or blasted rock) 10
W HEEL L OADER WA320-6 DIMENSIONS B C 47 D A E F G Tread 2050 mm 6'9" Width over tires 2585 mm 8'6" A Wheelbase 3030 mm 9'11" B Hinge pin height Standard Boom 3905 mm 12'10" max. height High Lift Boom 4545 mm 14'10" C Hinge pin height Standard Boom 480 mm 1'7" carry position High Lift Boom 645 mm 2'1" D Ground clearance 425 mm 1'5" E Hitch height 1095 mm 3'7" F Overall height, top of the stack 2975 mm 9'1" G Overall height, ROPS cab 3200 mm 10'6" Measured with 20.5-25-12PR (L3) tires, ROPS/FOPS Level 2 cab High Lift Boom Light Material Stockpile Stockpile Bucket Excavating Bucket Bucket Bucket Bolt-On Bolt-On Bolt-On Bolt-On Cutting Edges Cutting Edges Cutting Edges Cutting Edges Bucket capacity: heaped 2.8 m 3 2.3 m 3 3.2 m 3 2.3 m 3 3.7 yd 3 3.0 yd 3 4.2 yd 3 3.0 yd 3 struck 2.4 m 3 2.0 m 3 2.8 m 3 2.0 m 3 3.1 yd 3 2.6 yd 3 3.7 yd 3 2.6 yd 3 Bucket width 2740 mm 2740 mm 2685 mm 2740 mm 9'0" 9'0" 8'10" 9'0" Bucket weight 1230 kg 1195 kg 1410 kg 1195 kg 2,712 lb 2,634 lb 3,110 lb 2,634 lb Dumping clearance, max. height 2850 mm 2955 mm 2715 mm 3595 mm and 45 dump angle* 9'4" 9'8" 8'11" 11'10" Reach at max. height and 45 dump angle* 1035 mm 930 mm 1170 mm 950 mm 3'5" 3'1" 3'10" 3'1" Reach at 2130 mm 7' clearance 1580 mm 1530 mm 1640 mm 2080 mm and 45 dump angle* 5'2" 5'0" 5'5" 6'10" Reach with arm horizontal and bucket level* 2420 mm 2275 mm 2610 mm 2785 mm 7'11" 7'6" 8'8" 9'2" Operating height (fully raised) 5325 mm 5135 mm 5405 mm 5775 mm 17'6" 16'10" 17'9" 18'11" Overall length 7515 mm 7370 mm 7705 mm 8005 mm 24'8" 24'2" 25'3" 26'3" Loader clearance circle (bucket at carry, 12520 mm 12440 mm 12580 mm 12660 mm outside corner of bucket) 41'1" 40'10" 41'3" 41'6" Digging depth: 0 85 mm 85 mm 85 mm 131 mm 3.3" 3.3" 3.3" 5.2" 10 296 mm 275 mm 330 mm 316 mm 11.7" 10.8" 1'1" 1'1" Static tipping load: straight 12535 kg 12750 kg 12610 kg 9520 kg 27,635 lb 28,110 lb 27,800 lb 20,090 lb 40 full turn 11140 kg 11360 kg 11215 kg 8460 kg 24,560 lb 25,045 lb 24,725 lb 18,650 lb Breakout force 129 kn 148 kn 111 kn 133 kn 13180 kgf 15140 kgf 11280 kgf 13000 kgf 29,060 lb 33,380 lb 24,870 lb 29,980 lb Operating weight 14370 kg 14330 kg 14545 kg 14550 kg 31,680 lb 31,590 lb 32,070 lb 32,080 lb * At the end of B.O.C.E. All dimensions, weights, and performance values based on SAE J732c and J742b standards. Static tipping load and operating weight shown include lubricant, coolant, full fuel tank, ROPS cab, and operator. Machine stability and operating weight affected by counterweight, tire size, and other attachments. Apply the following weight changes to operating weight and static tipping load. 11
WEIGHT AND DIMENSION CHANGES Change in Change in Tipping Load Width Ground Change in Change in Operating Weight Straight Full Turn Over Tires Clearance Vertical Dimensions Reach 20.5-25-12PR (L2) 210 kg 463 lb 165 kg 364 lb 165 kg 364 lb 2585 mm 8'6" 425 mm 1'5" 0 mm 0" 0 mm 0" Install ROPS canopy (instead of cab) 150 kg 331 lb 150 kg 331 lb 140 kg 309 lb STANDARD EQUIPMENT 2-spool valve for boom and bucket controls Air conditioner Alternator, 60 A Automatic boom kickout Auto shift transmission with mode select system Back-up alarm Back-up lamp Batteries, 150 Ah/2 x 12 V Bucket positioner Counterweight, standard and additional (520 kg 1,146 lb) Deluxe suspension seat Directional signal Engine, Komatsu SAA6D107E-1 diesel Engine shut-off system, electric Floor mat Fuel pre-filter with water separator Hydraulic-driven fan with auto-reverse rotation KOMTRAX Lift cylinders and bucket cylinder Loader linkage with standard lift arm Main monitor panel with Equipment Management Monitoring System (EMMS) Mono-lever loader control with transmission F/R switch Radiator mask, lattice type Rear defroster (electric) Rear view mirrors, inside (2), outside (3) Rear window washer and wiper Rims for 20.5-25 tires ROPS/FOPS Level 2 cab Seat belt, 76 mm 3" retractable Service brakes, wet disc type Starting motor, 5.5 kw/24 V Steering wheel, tiltable Sun visor Transmission speed ranges, 4 forward and 4 reverse OPTIONAL EQUIPMENT 3-spool valve AM/FM stereo radio cassette Bucket, excavating 2.3 m 3 3.0 yd 3 Bucket, light material 3.2 m 3 4.2 yd 3 Bucket, stockpile 2.8 m 3 3.7 yd 3 Bucket teeth (bolt-on type) Cutting edge (bolt-on, reversible) Electronically Controlled Suspension System (ECSS) Engine pre-cleaner with extension High lift boom arrangement Limited slip differential (F&R) Rear full fenders ROPS canopy Secondary steering (SAE) Wide core radiator AESS757-00 2007 Komatsu America Corp. Printed in USA D12(7.5M)C 12/07 (EV-2) www.komatsuamerica.com Komatsu America Corp. is an authorized licensee of Komatsu Ltd. Materials and specifications are subject to change without notice is a registered trademark of Komatsu Ltd., Japan KOMTRAX TM is a trademark of Komatsu America Corp.